Poles are made of high-grade stainless steel with high resistance to corrosion and weather. Sails made of Dacron fabric are opened and closed by drive.
The important peculiarity of the Maestrale is operating by single drive installed in the shaft. It leads to uniform winding of sails and a smaller shaft diameter
The spring is inserted inside the sail tensioning pole, so all you need to do is act on the hoist (the system of rope and blocks commonly used on boats) accessible through an opening in the pole. By tensioning the spring, the hoist can support the weight of the sail. The positioning of the spring inside the pole also has benefits in terms of safety: if there is a strong wind the sail raises or lowers.